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G. H. ZOUCK.

BLOWPIPE.

APPLICATION FILED DEc.4. 191s.

1,310,10%.; Patented Ju1yl5,1919.

- sTATE-s PATENT orrion.

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ORANGE, NEW JERSEY, ASSIGNOB TO AIR REDUCTION COMPANY, INC., A CORPORATION OF NEW YORK.

BLownrE.

To all whom it may concern Be it known that I, GEORGE H. ZOUCK, a citizen of the United States, residing at Ora e, in the county -of Essex, State of New ersey, have invented certain new. and

v useful Improvements in Blowpipes; and I do hereby declarethe following to be a full,- clear and exact description of the invention,-

such aswill enable; others skilled in the art to which it appertains to make and. use'the This invention rel-ates to blow-pipes or torches, and. has for its primary object, the provision of an inexpensive simple and eflicient blow'pipe or torch structure, in which thegas inlet passages are securely sealed to preventleakage or premature mixing of the gases, including replaceable tips capable of producing fiames of varying dimensions and constructed to insure a proper relation by Volume of combustible and oxidizing-gases delivered to the discharge passage of the tip. Further objects and advantages of the invention willthe apparent as it is better understood 'by reference to the following specifica tion when read in connection the accompanying drawing illustrating the preferred embodiment thereof, in which%.

these-defects and'prov'ides a structure which combines with the utmost simphcit all,

' of the desirable characteristics of'an-e cient operator, other than the substitution of a tip of the required size.

Referring to the drawing, 5 indiates a head to which two pipes 6 and 7 are secured, .wheieby a supply of oxygen and of combustible gas.

Figure 1 is a longitudinal section through Specification Letters Patent. Patented July 15, 1919, Application filed December 4, 91s. Serial no. 265,195.

busti-ble gas are separately delivered to the head. Within the headtwo passages 8 and 9 are provided, the former communicating with the oxygen pipe 6 and the latter comwith the pipe 7 carrying commun-icating The head 5'is provided with a projecting conical seat 10, atthe apex of which the passage 8 terminates. The passage 9 terminates in an annular channel 11 in the seat 10 and a similar and concentric channel 12 is formed in the seat substantially midway between the channel 11 and the passage 8. One or more ducts 13 connect the channel 12 to the passage 8.

The tip 14 is secured to the head 5 by a coupling 15 and is provided at its inner end with a conical recess conforming to and forming with the conical surfaces on either side of the channels 11 and 12, gas tight seals which prevent leakage of the gases, or mixing other than in the manner and proportions determined by the structure, as hereinafter described.

The inner end of the tip 14 has one or more grooves or depressions 15 on its conical surface, which may be formed by mill-ing, pressing or otherwise, the groove or grooves being radially directed and of a length cient only to provide communication between the channels 11 and 12 when the tip is assem bled with the head. The groove or grooves 15 are accurately proportioned to the size of" the delivery passage 16 extending longitudinally of the tip in alinement with the passage 8 in the head. I

As will be readily understood, oxy n in the passage 8 is met by a quantity 0 comloustible gas, accurately proportioned by 5 passagethrough a groove or grooves 15 and y issuing through the ducts 13. The oxygen and combustible gas are mixed in the passage 8 and pass intothe discharge passage 16 of 'the tip and at its outlet are ignited loo and burned. v

Tips having discharge passages of difi'erent sizes are interchangeable with a single head and the groove or grooves 15 are accurately formed to permit the proportion of 10 5 combustible gas, adapted to produce the best results with the. particular size of discharge passage, to enter and mix with the stream of oxygen.

As will 'oe immediately apparent, the

' oxidizing gas passage.

structure is exceedingly simple both in form and in the operations required in its manufacture. No part of the blo ipe is liable to wear in service, which wil materially affect its 0 er-ation and none of its parts are liable to in ury even by careless use,

Various changes may be made in the form, arrangement and proportioning of the parts without departing, from the spirit or scope of the invention or sacrificing any of its material advantages, the form hereinbefore described beingmerely the preferred em-. bodiment thereof.

I claim v 1. A blowpipe comprising a head and a separable ti said head and tip having cooperating sur aces forminga (gas tight joint, passages in said head for oxi izing and combustible gases, a discharge passage in said.

gas

tip communicating with the oxidizin assage in said'head and means for de ivermg combustiblegas from the passage therefor in said head to said oxidizlng gas as'sage wherebythe gases are mixed within said head, including means in the tip and removable therewith to regulate the proportion of combustible gas delivered to said 2. A blowpipe comprising a head and a separable ti said head and tip having 005perating sur aces forming a gas tight joint,

assages in said head for oxi izing and combustible gases, a discharge passa e'in said tip communicating with the oxi 'zing-gas passage in said head, a channel in one of said surfaces communicating with the combustible gas passage, a concentric channel in one of said surfaces communicating with the oxidizing gas passage and a groove in the-surface of said tip connecting said channels to regulate the proportion of comhustible gas supplied to said oxidizing gas passage.

'3. A blowpipe comprising a head and a separable tip aving cooperating surfaces forming a gas tight joint, passages in said head for oxidizing and combustible gases, a discharge passa in said tip communicating with the oxi i zing gas passage in said head, a duct in said head communicating with said oxidizing gas assage, and a groove in the surface of sai tip connecting the combustible gas passage to said duct when the head and tip are in assembled relation. 4

4. A blowpipe comprising a head and a separable tip having cooperating conical passage.

' surfaces forming a gas tight joint, passa es in said head for oxidizing and combusti 1e gases terminating in the conical surface of said head, a groove in the conical surface of said tip communicating with the combustible gas passage when the head and tip are in assembled relation, a duct in said head whereby combustible gas passing through said groove is delivered to the oxidizing gas passage and a discharge passage in said tip communicating with said oxidizing gas passage, i

5. A blowpipe comprising a head and a separable tip, said head having a projecting conical seat and said tip having a conical recess at its end conformlng to said seat and forming therewith a gas tight joint, oxidizing an combustible gas passages in said head, a duct extending through said conical seat to the, oxidizin gas passage, agroove in the surface, of said conical recess' whereby the combustiblegas passage is connected to said oxidizing gas passage when the head and tip are in assembled relation and a discharge passage in said tip communicating oxidizing-and combustible gas passages, a

groove in surface of said conical recess connecting said channels when said head and tipare in assembled relation and a dis charge passage in said tip "communicating with said oxidizing gas passage.

7. A blowpipe comprising a head and a separabletip, said head having a projecting seat and said tip having a recess conforming to said seat and forming therewith a gas tight'joint, oxidizing and combustible gas assagesin said head, concentric chan nels in said seat, the combustible gas passage terminating in one of said channels, a duct connecting the other of said channels to the face of said recess connecting said channels when the head and tip are in assembled relation and a discharge passage in said tip communicating with said oxidizing gas In testimony whereof I afiix my si ature.

GEORGE H. ZO OK.

' oxidizing gas passage, a groove in the sur- 

